Single-shot measurement of UV ultrashort pulse laser

A single-shot transient-grating frequency-resolved optical gating (TG-FROG) device was set up to measure UV ultrashort pulse laser with pulse duration within 10ps. The performance of the device was demonstrated by experimental data measured on discharge-pumped KrF laser which is operated in 10Hz repeated frequency mode, and on electron-beam-pumped KrF laser which is only operated in single-shot mode. For the former, the TG-FROG can distinguish the changes of the pulse shape, spectrum and phase when the pulse chirp is changed. For the later, the TG-FROG finds that the pulse shape has multiple peaks whose pulse duration is about 2ps, and the spectrum is modulated whose bandwidth is about 1.3nm, and the corresponding phases present parabolic structure.